Boiler-furnace



(No Model.) 2 Sheets-Sheet l.

BOILER. PURNAGE.

No. 470,726f Patented Mar. 15, 1892.

. Llp Q Q wl III STATES PATENT Ormes.

JOSEPH F. VVANGLER, OF ST. LOUIS, MISSOURI.

BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 470,726, dated March 15, 1892.

Application filed December 19, 1891- Seral No. 415,644. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH F. WANGLER, of the city of St. Louis, Missouri, have made a new and useful Improvement in the Class of Boiler-Furnace Known as Slow-Combustion or Smokeless Steam-Boiler Furnaces, in which the grate-bars are formed of a gang or series of tubes opening at their inner ends into the boiler and at their front ends into a manifolded water chamber, through which the boiler water when heated continuously and rapidly circulates, of which the following isa specification.

In this class of furnaces, also, the fire, instead of burning from the bottom upward, burns from the top downward, the gases and smoke from combustion passing through the live fire.

The objects which I seek to attain in this improved construction are, first, to facilitate the heating of the water, of the boiler by exposing more of its bulk to the direct action of the furnace-fire; second, to provide means wherebyin the event of the tube-supply gratebars becoming clogged, collapsed, or burned out they may be severally and readily disconu nected for the purpose of removing and replacing them; third, to provide a simple means for obtaining an updraft to expedite the building of a fresh fire only, and, fourth, locating a blow-off plug-valve so as to readily and effectually blow-off. I attain these objects by the mechanism which the accompanying drawings illustrate, and in which- Figure I is a front elevation of a tubular boilerwith its setting and arrangement shown on line l l, Fig. III. Fig. II is a transverse section showing the same on line 2 2, Fig. III. Fig. III is a plan and side elevation corresponding to Figs. I and II. Fig. IV is a detail section of the front water chamber, showing pipe and nipple connection. Fig. Vis a similar view showing the pipe end expanded to make a joint; and Fig. VI, a detail sectional view of the middlek water-chamber, showing the pipe connection therewith.

Similarletters refer to similar parts thro ughout the several views.

In the drawings, A represents an ordinary boiler of the tubular pattern having its furnace internally constructed and integral with wallf3 is composed of lire-brick or refractory it through the water-chambers and pipe-bar connections shown, namely:

B is the depending boiler-space; C, the lower inner dependent boiler-space having connection with the space B by perpendicularly-arranged pipes e e.

D is the front water-chamber connected at its ends to the lower front part of the boiler A by the leaders E E and connected at its inner side by the slightly-inclined horizontal pipes e c to the space C, and through said lastmentioned space to the boiler A at the depending portion B thereof through the pipes e e', the circulation of the water through this system being indicated in the drawings by the direction of the feathered arrows. The usual size of the pipes e e is about one and one-half inches inside measurement, and they are made with athick shell to better resist the action of the lire carried on the horizontal tubes.

The pipe-nipple t', Figs. IV and V, is provided with a male and female screw-thread, the former for screwing it in the water-space D and the latter to receive the inner end of the horizontal tube-bars e c. The latter after it receives the nipple is expanded, so as to make a' close joint with the shoulder c4 and the inner end of the nipple inside the space D. The opposite end of the pipes e e are screw-fittedwith a long thread to t into the manifold of the space O and allow room for releasing the inner end of the pipe e from its connection with the nipple t', in the manner shown.

f3 represents the rear wall of the fire-box F. It is provided with an opening about its middle to admit of having an upward draft to the chimney when a fresh fire is being started in the furnace, said opening being closed as soon as the lire is under good lheadway by the damper X -(shown by dotted lines in Fig. I) and kept closed thereafter. The

tiling and is supported upon the inner ledge of the water-chamber C. .t G represents the furnace-bridge, f the furnace-feed door, and f the door of the ash-pit, the furnace-doorf being provided with small openings to admit air to the fire. Otherwise the fire-box F is closely built above and on IOO the sides and remains so, except when the damper X is opened on starting the tire, thus providing a downdraft, the flue being below the grate and the products of combustion finding egress up the chimney in the direction indicated by the nnfeathered arrows.

d, d', d2, and cl3 is the blow-off apparatus located at one end of the Water-chamber D, at the lowest point in the construction, through which the boiler-water circulates, and therefore conveniently adapted to blow ott the impurities in the pipes, water-chambers, and boiler and cleanse the saine.

The pipes e receive the heat of the fire directly it leaves the tire-box F, and together with the water-chamber C, similarly acted upon, affords good facilities for qnicklyheatin g the water by ottering a direct action of the heat to the body of Water contained therein.

I am aware that downdraft boiler-furnaces provided with water-chamber and tube gratebar connections with a boilerare not new. I therefore make no broad claim thereto; but

NVhat I do claim as new, and desire to secure by Letters Patent, is-

In a downdraft and Water-pipe gratefurnace ofa boiler, the combination of the depending water-eharnbers B C D with the horizontal and perpendicular pipes e c', the form er being connected at their forward end by a nipple, thus affording means for adjusting or readjnsting the said pipes, substantially in the manner shown and described, and for the purpose specified.

JOSEPH F. VANGLER.

"Witnesses:

CHAs. J. WANGLER, J oI-IN A. LEY. 

